It's finally summer vacation and time to chill out for sixth graders Mattie and Pete, but when the friends discover an unusual book that leads them to a mysterious treasure map they suddenly find their older, teen selves sucked into a warring parallel world where they become the heroes. Here, the future writer, Mattie, and the courageous one-handed Pete must battle to save all those enslaved under the vile rule of Mt. Snagra's Vulture King or remain trapped inside a book forever